I think you have too many hands there

Keep in mind that most of the satelite channels are not HDTV quality yet anyhow. With hard drives advancing the way they are, it shouldn't be too hard soon to throw togther a Tivo HDTV version. It's probably still at least two years away though, soypu might as well get something now that works. I personally would advise getting a satelite integrated PVR unit. The commercial skipping feature is nice on the ReplayTV, but on your setup, you want the best quality possible. Being able to save the raw satelite feed will be well worth it.

Hopefully with the merger, SonicBlue can relesae a "Satelite PVR" one day.